setup_postdata doesn`t seem ot be working

According to the Codex, you seem to skip the most important global $post; at the beginning, like this:

global $post;
$posts = get_posts($args);
  foreach($posts as $post) {
    setup_postdata($post);
  ?>
  <article class="col two tablet-four mobile-six box">
    <a href="https://wordpress.stackexchange.com/questions/131909/<?php the_permalink(); ?>" title="<?php the_title_attribute(); ?>">
      <div class="featured-image">
      <?php if(has_post_thumbnail(get_the_ID())): ?>
        <?php $image = wp_get_attachment_image_src(get_post_thumbnail_id(get_the_ID()), array(650,200)); ?>
        <div style="background: url('<?php echo $image[0]; ?>') center center no-repeat;"></div>
      <?php endif; ?>
      </div>
      <section class="content">
        <?php $cat = get_the_category(get_the_ID()); ?>
        <span class="category"><?php echo $cat[0]->cat_name; ?></span>
        <?php the_title(); ?>
        <?php the_excerpt(); ?>
      </section>
    </a>
  </article>
  <? }
  wp_reset_postdata();